Preventive Maintenance - McCulloch MCP1510 Manuel D'utilisation

6 - BAR/CHAIN MAINTENANCE
6-1. GUIDE BAR MAINTENANCE
WARNING
Ensure that the power cord is disconnected before perform-
ing any maintenance on your saw.
Proper maintenance of the guide bar, as explained in
this section, is essential to keep your saw in good
working order.
GUIDE BAR MAINTENANCE :
Most guide bar problems can be prevented merely by keep-
ing the chain saw well maintained.
Incorrect filing and non-uniform cutter and depth gauge set-
tings cause most guide bar problems, primarily resulting in
uneven bar wear. As the bar wears unevenly, the rails
widen, which may cause chain clatter and difficulty in mak-
ing straight cuts.
Insufficient guide bar lubrication and operating the saw with
a chain that is TOO TIGHT will contribute to rapid bar wear
(see Section 6-2).
To help minimize bar wear, the following guide bar mainte-
nance is recommended.
BAR WEAR - Turn guide bar frequently at regular intervals
(for example, after 5 hours of use), to ensure even wear on
top and bottom of bar.
BAR GROOVES - Bar grooves (or rails which support and
carry the chain) should be cleaned if the saw has been
heavily used or if the saw chain appears dirty. Rails should
always be cleaned every time the saw chain is removed.
OIL PASSAGES - Oil passages at bar pad should be
cleaned to ensure proper lubrication of the bar and chain
during operation. This can be done using a soft wire small
enough to insert into the oil discharge hole.
TO CLEAN GUIDE BAR RAILS:
1. Remove sprocket cover, bar and chain (see Section 3-
4).
2. Using a screwdriver, putty knife, wire brush or other
similar instrument, clear residue from the rails on the
guide bar.
This will keep the oil passages open to provide prop-
er lubrication to the bar and chain (Figure 6-1A).
3. Reinstall the bar, chain and bar bolt retaining nuts.
(See Section 3-4).
6-1A
6-2. CHAIN MAINTENANCE INSTRUCTIONS
WARNING
Unless you have experience and specialized training for
dealing with kickback (see Safety Precautions), always use
a low-kickback saw chain, which significantly reduces the
danger of kickback. Low-kickback saw chain does not com-
pletely eliminate kickback. A low-kickback or "safety chain",
should never be regarded as total protection against injury.
A low kick saw chain should always be used in combination
with other kickback protection devises such as a hand
guard and reduced kickback guide bar supplied with the
your unit.
Always use a replacement saw chain designed as "low-
kickback" or a saw chain which meets the low-kickback per-
formance.
A standard saw chain (a chain which does not have the
kickback reducing guard links) should only be used by an
experienced professional chain saw operator.
What is a Low-Kickback Saw Chain?
A low-kickback saw chain is a chain which has met the kick-
back performance requirements of ANSI B175.1. Do not
use other replacement chain unless it has met these
requirements for your specific model.
By keeping the saw chain in good working condition and
correctly serviced as recommended in this manual, you will
be able to maintain the safety system of your chain saw
over the life of the product.
WARNING
Never remove, modify or make inoperative any safety
device furnished with your unit. The hand guard, reduced
kickback guide bar and low kick back saw chain are major
safety features provided for your protection.
WARNING
Always wear heavy duty protection work gloves and discon-
nect the extension cord when working on the saw chain.
CHAIN TENSION:
Check the chain tension frequently and adjust as often as
necessary to keep the chain snug on the bar, but loose
enough to be pulled around by hand. (See Section 3-5,
Saw Chain Tension Adjustment).
BREAKING IN A NEW SAW CHAIN
A new chain and bar will need readjustment after as few as
five (5) cuts.This is normal during the break-in period,
and the interval between future adjustments will begin to
lengthen quickly.
Over a period of time, however, the moving parts of the saw
chain will become worn, resulting in what is called CHAIN
STRETCH. This is normal. When it is no longer possible to
obtain correct chain tension adjustment, a link will have to
be removed to shorten the chain. See your McCulloch
Authorized Service Center to have this repair performed.
WARNING / CAUTION
Never have more than three (3) links removed from a loop of
chain this could cause damage to the sprocket.
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7 - PREVENTIVE MAINTENANCE

7-1. PREVENTATIVE MAINTENANCE
WARNING
SERVICING A DOUBLE INSULATED CHAIN SAW
In this double insulated chain saw, 2 systems of insulation,
instead of grounding, are provided. No grounding means is
provided on a double insulated chain saw, nor should a
means for grounding be added to the chain saw. No serv-
iceable parts are inside. A double insulated chain saw is
marked with the words, "DOUBLE INSULATION" or "DOU-
BLE INSULATED". The symbol (square within a
square) may also be marked on the chain saw.
1. Place switch in OFF position and unplug the power
supply before the chain saw is serviced, cleaned, or
maintenance is performed.
2. Keep the air intake clean and air vents free of debris
to avoid overheating the motor.
3. Clean with a damp sponge and mild soap. Do not
squirt with a water hose or douse with water or other
liquids.
4. Inspect the saw chain for proper tension before each
use and frequently during cutting. Sharpen as
required.
5. Clean the guide bar and bar pad to ensure free path
for oil.
6. Turn the bar over after each use to achieve even wear.
7. No motor lubrication is necessary. The motor is
equipped with lifetime lubricated bearings.
8. If the saw does not operate, turn switch to OFF posi-
tion and disconnect the extension cord, first from the
power supply, then from the saw. Check the power
supply for blown fuses or tripped circuit breakers. If it
still does not operate, contact the McCulloch Product
Service Department, through the toll-free number list-
ed on the back cover of this manual, for service infor-
mation. Do not attempt to repair it yourself. No serv-
iceable parts are inside.
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